IPA restricted vs unrestricted foods: how to check a label
By Nashua Nutrition Editorial · Last reviewed September 2026
Quick answer: On an IPA plan, unrestricted foods are the lower-carb, lower-calorie packets. Restricted foods run a little higher in carbs or calories. Our IPA page describes a day with two unrestricted packets and one restricted packet. Each food's own label decides which tier it's in.
IPA restricted vs unrestricted is one of the first things people ask about on this kind of plan. Many people who shop with us want an alternative to the Ideal Protein protocol. That protocol is a structured, high-protein plan that clinics offer. Nashua Nutrition does not sell Ideal Protein products. IPA stands for Ideal Protein Alternatives. These are foods from other brands that fit the same style of phased plan, and they're what we sell.
This guide explains the two tiers in plain words. It shows how to check a food's label, and it walks through two real products. For the bigger picture of each phase, see our guide to what to eat on an IPA plan.
What do restricted and unrestricted mean?
Both tiers are high-protein foods made for a structured plan. The difference is how much room each one takes up in your day.
- Unrestricted. Lower in carbs, fat, and calories. Our IPA page says these can be used up to twice a day.
- Restricted. A little higher in carbs, fat, or calories. Our IPA page says these are limited to once a day.
Our store sorts every product into a tier from its own nutrition label and ingredient list. Here are the numbers our collections use. These are our store's shopping filters, not the protocol's rules. Your coach's list may draw the lines a little differently.
| Tier | Estimated Net Carbs | Calories | Protein | Fat |
|---|---|---|---|---|
| Unrestricted | Under 9 g | 160 or fewer | 12 g or more | Under 30% of calories |
| Restricted | 16 g or fewer | 200 or fewer | 12 g or more | Under 30% of calories |
A food has to clear every number in a row to sit in that tier. There is one more filter for both tiers. Any aspartame, MSG, or wheat-based protein in the ingredients keeps a food out of both. You can browse every product that passes in our unrestricted IPA collection and our restricted IPA collection.
How many restricted foods fit in a day?
Our IPA page says unrestricted items can be used up to twice a day. It says restricted items are limited to once a day. It also notes that many people use three packets a day, at breakfast, lunch, and a snack.
The page's daily example looks like this:
- Breakfast: one unrestricted packet
- Lunch: one unrestricted packet
- Snack: one restricted packet
- Dinner: a lean protein and vegetable meal, as your provider outlines
The IPA calculator on that page gives each result a short tip. A restricted result usually comes with the tip "Limit to one per day."
Your routine may look different. Your coach or provider sets the packet count that fits you, and it can change as you move through the phases. If you've had bariatric surgery, your surgical team's plan comes first. Our guide to the IPA diet after bariatric surgery covers how the two fit together.
How do you check whether a food fits?
A food you already like may fit your plan. The label on the box tells you. Here is the order many people check it in:
- Serving size. The FDA explains that every number on the label, calories included, refers to one serving. One serving is one packet.
- Calories. Compare them with the table above.
- Protein. Look for 12 g or more per serving.
- Fat as a share of calories. MedlinePlus notes that fat has 9 calories per gram. So multiply the grams of fat by 9, then compare that with the total calories.
- Estimated net carbs. Take the total carbs, then subtract the fiber and any sugar alcohols.
- Ingredients. Scan the list for aspartame, MSG, and wheat-based protein.
Net carbs is a handy shortcut, but it isn't an official label term. The American Diabetes Association says "net carbs" has no legal definition. It is not used by the FDA, either. UCLA Health describes the same subtraction we use here. The ADA also points out that some fiber and sugar alcohols are partly digested. If you live with diabetes, ask your care team how to count carbs.
A worked label check
Here are two real products from our shelves, checked step by step. The numbers come from each product's own label.
| Check | Proti-thin barbecue chips | Weight Loss Systems caramel cocoa bar |
|---|---|---|
| Serving size | 1 bag (36 g) | 1 bar (45 g) |
| Calories | 140 | 160 |
| Protein | 15 g | 15 g |
| Fat | 4.5 g x 9 = about 40 calories, about 29% of 140 | 5 g x 9 = 45 calories, about 28% of 160 |
| Estimated Net Carbs | 10 g carbs minus 6 g fiber = 4 g | 18 g carbs minus 4 g fiber minus 2 g sugar alcohols = 12 g |
| Aspartame, MSG, or wheat-based protein in the ingredients | None listed | None listed |
| Tier | Unrestricted | Restricted |
Estimated net carbs based on the nutrition label. Actual net carbs may vary based on manufacturer claims for sugar alcohols and other low-glycemic ingredients.
The chips clear every unrestricted number. Their fat sits close to the line at about 29%, but it stays under 30%. The bar clears the calorie, protein, and fat numbers. At 12 g, though, its estimated net carbs are too high for unrestricted. That puts it in the restricted tier. Both have their own product pages. See the Proti-thin barbecue protein chips and the Weight Loss Systems caramel cocoa bar.
Prefer not to do the math? The IPA calculator does it for you. Type in the calories, fat, protein, carbs, fiber, and sugar alcohols from the label. It shows how the food reads in phases 1, 2, and 3. If you paste in the ingredients, it flags aspartame. It doesn't screen for MSG or wheat-based protein, so check the ingredient list for those yourself.
Which protein sources count?
Protein is the center of this plan. MedlinePlus calls proteins the building blocks of life. They help your body repair cells and make new ones.
Our IPA page lists the protein sources that fit the plan's packets:
- Whey protein isolate
- Soy protein
- Milk isolate or casein
- Pea protein
- Other plant protein isolates
An isolate is protein that has been separated out from the rest of the food. Wheat or grain protein doesn't count as the main protein in a packet. You'll find the protein sources near the start of the ingredient list. The chips above, for example, list soy, pea, and whey protein first.
Do Proti-thin, Weight Loss Systems, and ProtiDiet foods fit?
Many of them do, but not all of them. The brand isn't the test. Each product's label is. When we checked our shelves in September 2026, here is how each brand's active products sorted:
- Proti-thin: 38 of 79 products fit a tier, with 31 unrestricted and seven restricted.
- Weight Loss Systems: 34 of 55 products fit a tier, with 19 unrestricted and 15 restricted.
- ProtiDiet: 24 of 43 products fit a tier, with 22 unrestricted and two restricted.
The rest are still high-protein foods. They just run higher in carbs or calories than an IPA tier allows, or they miss another check. Our two IPA collections show which products fit each tier. You can see all three brands together in our Proti-thin, Weight Loss Systems, and ProtiDiet collection. If you're curious where packet plans like these come from, our article on the protein-sparing modified fast covers the background.
A day of IPA picks, meal by meal
Here are options for each part of the day, with the tier beside each one. Think of this as a menu to choose from, not a day to eat all of. Pick what fits the packet count your plan gives you.
Breakfast
A shake is a simple start that needs no cooking. The Weight Loss Systems berry cream smoothie (unrestricted) mixes with cold water. If you'd rather mix a thicker shake, try the Weight Loss Systems dark chocolate pudding and shake mix (unrestricted). Protein oatmeal and other warm breakfasts are in our unrestricted IPA collection.
Lunch
A warm soup can feel more like a meal than a shake. The Proti-thin Italian tomato protein soup (unrestricted) mixes with hot water in a few minutes.
Snack
This is where many people use their one restricted packet. A Weight Loss Systems double berry bar (restricted) or a caramel cocoa bar (restricted) travels well. If you want something salty and crunchy, the Proti-thin barbecue chips (unrestricted) come in single bags.
Dessert
Some people like to save a packet for the evening. The Weight Loss Systems custard toffee protein pudding (unrestricted) is one option. The Proti-thin strawberry banana protein gelatin (unrestricted) is a lighter one.
Dinner
On our IPA page's daily example, dinner is a whole-food meal of lean protein and vegetables, as your provider outlines. Packets usually cover the other parts of the day.
Do drinks count as a packet?
A protein drink usually does. Our IPA page says packets can come as boxes, pouches, or bottles. It says one serving equals one packet, no matter the form. That means a protein drink is counted like any other packet.
The Proti-thin lemon fruit drink (unrestricted) is one example. It's a cold drink with 15 g of protein per packet, so it takes a packet's place in your day. Some people like a cold drink on warm days, when soup or cocoa feels too heavy.
Flavored waters and drink mixes with little or no protein are a different case. Plans differ on how they count those. Ask your coach or provider how your plan counts them.
Key takeaway: check the label, then follow your plan
Unrestricted and restricted are two tiers of the same kind of food. The label decides which tier a food is in, and a few quick checks tell you. Our collections do that sorting for you. The calculator helps with a food you already have at home.
Your coach or provider sets how many packets fit your day. When you're ready to shop, our IPA page is a helpful place to start.
Frequently asked questions
What if I have two restricted foods in one day?
It happens, and it's one day out of many. Many people simply pick up with their usual plan at the next meal. If it keeps happening, it may be a sign that the plan needs a small change. For example, you might like a salty snack in the afternoon. A crunchy unrestricted option could fill that spot. Your coach or provider can help you find a pattern that feels easier to keep.
Should I skip restricted foods when I'm just starting?
Not unless your plan says so. The daily example on our IPA page includes one restricted packet, so it's part of a common day. Many people find that one bar or pudding a day makes the plan easier to stick with. Others feel unsure at first and want to keep things simple. Either way, your coach or provider sets your plan. Ask what they suggest for your first weeks.
Is every Proti-thin product IPA-friendly?
No, and the same goes for every brand. Two flavors from one brand can land in different tiers, or outside both. A product can also change when its maker updates the recipe. That's why our tiers come from each product's own label, not its brand. If you're unsure about a box you already own, run its label through the calculator.
Which protein bars don't taste chalky?
Taste is personal, so one person's favorite may not be yours. Many people find texture matters as much as flavor. Some prefer a crisp or chewy bar, and others would rather skip bars for pudding or chips. A single-serve bag or a mixed order lets you try a few before you stock up. It's also fine to set a flavor aside and come back to it later.
Does sugar-free gelatin count as a packet?
It depends on the gelatin. A protein gelatin made for this kind of plan counts as a packet, because one serving is one packet. The Proti-thin gelatin has 15 g of protein per serving. Regular sugar-free gelatin from the grocery store has very little protein, so it isn't a packet. Plans differ on whether it's a free extra, so ask your coach or provider how yours treats it.
Sources and further reading
- FDA: how to understand and use the Nutrition Facts label
- American Diabetes Association: get to know carbs
- UCLA Health: net carbs are carbs minus fiber and sugar alcohols
- MedlinePlus: dietary fats explained
- MedlinePlus: protein in diet
This content is for general information, education, and encouragement only. It is not medical advice and is not intended to diagnose, treat, cure, or prevent any disease or condition. Nutrition, movement, medication, and lifestyle choices should always be discussed with your healthcare provider, surgeon, or registered dietitian. Individual needs vary, especially for those using GLP-1 medications, living with diabetes, or recovering from bariatric surgery. Always follow the guidance of your own care team. Nashua Nutrition does not employ medical professionals and does not provide clinical care.